LL1515 is a microphone input transformer with turns ratio 1+1:7 (200 ohm : 10k) The LL1515 is discontinued and no data sheet is available.
For replacements, please study LL1530 or LL1576.
Pin configuration (transformer seen from component side with label readable)
4, 3, 2, 1
LL1515
8, 7, 6, 5
LL1515 Usage (1:7)
in+ pin 1 + 3
in- pin 2+4
out+ pin 6
out- pin 7
ground pin 5
